E3S Web Conf.
Volume 356, 2022The 16th ROOMVENT Conference (ROOMVENT 2022)
|Number of page(s)||4|
|Section||Underground Environment and Specialized Application|
|Published online||31 August 2022|
Analysis on air volume balance and resistance characteristics of central exhaust system in tunnel
Shandong Electric Power Engineering Consulting Institute Corp., LTD, China
* Corresponding author: firstname.lastname@example.org
With the increase of tunnel length, the air volume imbalance among the outlets for the central exhaust system is serious. Which causes the actual air volume of the end outlet is small. Combined with the design of an urban road tunnel, even air distributor (EAD) groups are installed in the exhaust duct. For different EAD groups setting, the air volume imbalance among the outlets and the resistance characteristics of exhaust system are analyzed. The results show that EAD groups improve the air exhaust uniformity significantly, which is less affected by the exhaust air volume. Furthermore, the flow impedance of the exhaust duct presents a two-stage increase distribution corresponding to the augment of exhaust air rate for a given duct width. For the central exhaust system equipped with EAD groups, closing the 1#-3# outlets can further reduce the CO concentration in the middle section of tunnel.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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